Tray blank



FIG. 1 is a top plan view of a tray blank embodying my new design, the bottom plan view being substantially the same in appearance;

FIG. 2 is a side elevational view of the blank shown in FIG. 1.

The tray blank is constructed of material of conventional thickness, and the dashed lines in the drawing represent fold lines. 

The ornamental design for a tray blank, substantially as shown and described. 